Autonomous system
AS21633 DOI-NBC-NET - U.S. Department of the Interior
Unclassified ARIN
Summary
U.S. Department of the Interior
government federal us network
The AS handle DOI-NBC-NET is operated by the U.S. Department of the Interior.
What it's used for
- The address space carries internal government infrastructure, evidenced by netnames such as
US-DEPARTMENT-OF-THE-INTERIOR,UDI-1-Z, andAMD-GOV. - The AS announces 2816 IPv4 addresses across 4 prefixes with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.
Notable
- All registrants for the announced prefixes are listed as the U.S. Department of the Interior, consistent with the AS holder.
- The address inventory consists of four distinct IPv4 blocks, including a /21 and three /24s, with no IPv6 prefixes in the inventory.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 2.82K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21633- Registry name
- DOI-NBC-NET
- Registrant
- U.S. Department of the Interior
- Abuse contact
- steven_harrington@ios.doi.gov
- Registered
- 2001-06-01
- Last changed
- 2023-11-17
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS21633
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 4 announcements
- Route objects
- 0 naming AS21633
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 453 networks and 1,846 prefixes, as published 2026-11-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere